II 



PREPARING FOR THE JOURNEY 



A LTHOUGH the bird traveler has no trunk 

 JL\. to pack, guidebook to study, nor ticket 

 to buy, still he must make some preparations for 

 the journey. 



The Warbler which nests in Alaska and passes 

 the winter in northern South America, should 

 not begin a seven-thousand-mile voyage through 

 the air, over mountains, plains, and seas unless 

 its engine is in good order and it has a proper 

 supply of fuel. 



"But," you ask, "what is a bird's engine and 

 where does it carry fuel?" A bird's engine is 

 really its wings and the muscles which move 

 them. It is one of the most perfect engines in 

 the world. It is simple but strong. It works 

 easily but is powerful, and it rarely gets out of 

 order. 



For many years man tried to make flying- 



